Classifications

• • C—CHEMISTRY; METALLURGY
  • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
  • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
  • C02F1/00—Treatment of water, waste water, or sewage
  • C02F1/008—Control or steering systems not provided for elsewhere in subclass C02F
• • C—CHEMISTRY; METALLURGY
  • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
  • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
  • C02F1/00—Treatment of water, waste water, or sewage
  • C02F1/68—Treatment of water, waste water, or sewage by addition of specified substances, e.g. trace elements, for ameliorating potable water
  • C02F1/685—Devices for dosing the additives
  • C02F1/686—Devices for dosing liquid additives
• • C—CHEMISTRY; METALLURGY
  • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
  • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
  • C02F2209/00—Controlling or monitoring parameters in water treatment
  • C02F2209/005—Processes using a programmable logic controller [PLC]
  • C02F2209/006—Processes using a programmable logic controller [PLC] comprising a software program or a logic diagram
• • C—CHEMISTRY; METALLURGY
  • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
  • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
  • C02F2209/00—Controlling or monitoring parameters in water treatment
  • C02F2209/02—Temperature
• • C—CHEMISTRY; METALLURGY
  • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
  • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
  • C02F2209/00—Controlling or monitoring parameters in water treatment
  • C02F2209/05—Conductivity or salinity
• • C—CHEMISTRY; METALLURGY
  • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
  • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
  • C02F2209/00—Controlling or monitoring parameters in water treatment
  • C02F2209/05—Conductivity or salinity
  • C02F2209/055—Hardness
• • C—CHEMISTRY; METALLURGY
  • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
  • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
  • C02F2209/00—Controlling or monitoring parameters in water treatment
  • C02F2209/06—Controlling or monitoring parameters in water treatment pH
• • C—CHEMISTRY; METALLURGY
  • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
  • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
  • C02F2209/00—Controlling or monitoring parameters in water treatment
  • C02F2209/40—Liquid flow rate
• • C—CHEMISTRY; METALLURGY
  • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
  • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
  • C02F2303/00—Specific treatment goals
  • C02F2303/08—Corrosion inhibition

Definitions

• the invention relates to a metering system comprising
• At least one storage container with water conditioning agent at least one storage container with water conditioning agent
• Water conditioning agent from the at least one reservoir into the water to be treated.
• water conditioning agent often waters with certain properties are required or desired, these properties being achieved by the addition of water conditioning agent.
• a hardness stabilizer may be added to hard water to reduce limescale in subsequent water installations.
• Water conditioning agents are typically by means of a
• Dosing pump added to a water to be treated the amount of conditioning agent added is typically selected depending on the amount of water to be treated.
• EP 2 248 769 A2 discloses a process for the purification of waste water by means of a metering of chemicals, in particular precipitants. With the help of information about the raw water supplied, the wastewater to be treated and / or the treated wastewater, the amount of
• Wastewater treatment outcome Detailed details for controlling the dosage are not disclosed.
• German patent application 10 2011 006 176 has been proposed to control a dosing depending on the conductivities of the untreated water and the treated water.
• Conductivity of the untreated water sets a target value for the difference between the conductivities of the treated and the untreated water.
• the difference is about the addition of a
• Water conditioning agent adjusted to the setpoint. This allows the dosing to be adapted to a variable water quality.
• the measured values for the conductivities of the untreated water and the treated water are subject to metrological constant slight fluctuations, whereby a constant readjustment of the dosing of the dosing is effected. This leads to a high degree of wear during the control process of the dosing system.
• Another disadvantage is that this procedure usually requires two conductivity sensors.
• At least one storage container with water conditioning agent at least one storage container with water conditioning agent
• Water conditioning agent from the at least one reservoir into the water to be treated
• an electronic control device for controlling the metered addition of water conditioning agent to the water to be treated in dependence on the water parameter of the water to be treated, measured with the sensor
• Water parameters of the water to be treated are programmed, b) in a memory of the electronic control device
• the electronic control device is designed to make a measurement of the water parameter of the water to be treated, a
• the electronic control device is designed to operate the dosing system according to the associated operating mode.
• the quality of the water to be treated is monitored via (at least) one sensor, wherein this sensor typically protrudes into the water to be treated or is flushed around by it.
• the water quality is then determined by means of the programmed (predefined)
• Parameter intervals categorized. Depending on the parameter interval (or the predefined quality category) applicable to the measured value of the sensor, an operating mode is then defined.
• the mode of operation determines in particular the metered addition of water conditioning agent to the water to be treated, usually in the form of a desired one
• the operating mode or metering is not dependent on the exact value of the water parameter (which typically varies significantly), but only on its affiliation with one of the parameter intervals.
• the interval size is one or more, preferably all parameter intervals, at least five times, preferably at least ten times, more preferably at least fifty times the standard deviation of the sensor reading from its mean value with unchanged water quality.
• Water conditioning agent set up Preferably, however, not more than one hundred, more preferably not more than ten, most preferably not more than six consecutive parameter intervals are set up for the water parameter. The same applies to any further water parameters and their further parameter intervals.
• a water conditioning agent according to the invention contains one or more chemical substances for water treatment.
• Typical chemical substances for water treatment are hardness stabilizers (such as polyphosphates), corrosion inhibitors (such as silicates or ortho-phosphates), precipitants (such as FeS0 4 , FeCl 3 or AIS0 4 ) or hardeners (such as Ca (HC0 3 ) 2 solutions).
• Preferred embodiments of the invention Particularly preferred is an embodiment of the dosing system according to the invention, in which the electronic control device is designed to automatically repeat step c) on a regular basis and to operate the dosing system according to step d) with the respectively last assigned operating mode.
• the electronic control device is designed to automatically repeat step c) on a regular basis and to operate the dosing system according to step d) with the respectively last assigned operating mode.
• the senor is read out continuously or at fixed time intervals, typically at a frequency between once every minute and once every week, or at fixed treated amounts of water, typically at a frequency of between every hundred milliliters and every one hundred liters.
• the water parameter is a conductivity, a pH, an ion content, in particular Ca ion content, or a temperature of the water to be treated.
• the conductivity can be used to determine the hardness and, in general, the corrosion behavior of the water to be treated.
• the pH affects the location of
• Equilibria in water especially the lime-carbonic acid balance, and also directly the corrosion behavior.
• About the ion-selective electrode can be concluded directly on the calcium content or hardness in the water to be treated (especially if conductivity measurements are not or only inaccurately evaluated, for example, due to previous ion exchange processes).
• the temperature also influences the position of equilibria, especially the lime-carbonic acid equilibrium, and in particular affects the velocity of
• Corrosion processes If one or more further sensors are also provided or one or more further water parameters are additionally evaluated, these are preferably likewise selected from the above selected options. In particular, a detection of conductivity and pH or conductivity and temperature is preferred.
• the dosing comprises a flow meter, especially in the inlet.
• Metering be made more accurate.
• the metered addition can also take place without explicit determination of the amount of water to be treated, for example by temporally periodic delivery of predefined quantities
• Conditioner regardless of water consumption, or by entrainment of conditioning agent depending on the strength of the volume flow of the water to be treated according to the principle of the water jet pump.
• Water conditioning agent is obtained in the treated water.
• the amount or concentration of the same water conditioning agent can be adapted directly to the water quality. If, due to the value of the water parameter or the associated parameter interval, more or less need for the water conditioning agent is detected, more or less is added accordingly.
• the dosing plant comprises a plurality of reservoirs with different water conditioning means.
• the individual water conditioning agents can be used more purposefully.
• each reservoir contains a different chemical substance for water treatment. Note that in an operating mode one or more water conditioning agent can be added.
• the dosing plant comprises a plurality of reservoirs with mixtures of a plurality of chemical substances for water treatment, wherein the mixing ratios of the chemical substances in the mixtures are different, in particular wherein a separate reservoir is provided for each operating mode.
• the use of mixtures facilitates the relative dosage of different chemical substances. If a separate mixture is provided in a reservoir for each mode of operation, a fixed absolute ratio of water conditioning agent and water to be treated can be operated, which simplifies the control of the dosing system.
• Programming the memory of the electronic control means the type of water conditioning agent (s) and / or the amount of water conditioning agent (s) intended to be metered per amount of water to be treated within at least one of
• Modes of operation vary with time. This can be a beginning of a
• ortho-phosphates can be added to the drinking water to protect against corrosion.
• a phosphate protective layer is formed on the material to be protected (such as a steel pipe). To build up the protective layer, a larger amount of orthophosphate is needed in the initial phase, while later lower concentrations are sufficient to maintain the protective layer. To take this effect into account, can in the same
• Operating mode for example, the metered addition of orthophosphates after treatment of a certain amount of water (about 50 m 3 ) or after a certain time since the start of the operating mode (about 6 months) halved.
• the metering system comprises at least one further sensor for detecting a further water parameter in the inlet, that according to a) in a memory of the electronic control device also several, subsequent, further parameter intervals of possible values of the further water parameter in programmed water are programmed, and that the electronic control device is adapted to c) also measure the other water parameters of the untreated water, make an assignment of the measured value of the further water parameter to one of the other parameter intervals, and the assignment of the operating mode also in dependence from the assigned, further
• Parameter interval By including (at least) one further water parameter, the adaptation of the dosing capacity to the water quality can be carried out even more precisely.
• the dosing system further comprises a signal generator
• an upper limit and / or a lower limit for the measured Water parameter of the water to be treated is stored,
• the electronic control device is designed to output an alarm message via the signal generator if the measured value of the water parameter of the water to be treated exceeds the upper limit value and / or if the measured value of the water parameter of the water to be treated falls below the lower limit value.
• the alarm alerts the user to a significant change in water quality or sensor failure.
• Control device is designed to switch to a predefined standard operating mode when the measured value of
• Water parameter of the water to be treated exceeds the upper limit and / or if the measured value of the water parameter of the water to be treated falls below the lower limit
• the standard operating mode is an average value of the water parameter of the water to be treated
• Measured value is accepted. As a result, a better matching dosing performance is usually achieved than with the actual measured value.
• the scope of the present invention also includes a method for
• the dosing plant doses water conditioning agent into water to be treated, in particular a stream of water to be treated, so that a treated water is obtained,
• a water parameter of the water to be treated is determined with a sensor, and the dosing system is added to the water to be treated, depending on the determined value of the water parameter water conditioning agent,
• step c) is repeated regularly and the operation according to step d) takes place with the respectively last assigned operating mode.
• step c) is repeated at fixed time intervals or after solid treated amounts of water.
• the same water conditioning agent can be adapted directly to the water quality.
• a metered addition of a first water conditioning agent is provided in at least one first operating mode, and in at least one second operating mode a metered addition of this first
• Water conditioning agent is added only when it is really needed.
• Water conditioning agent is added only when really needed, with the first and second water conditioning agents each being adapted to different water qualities.
• Another, preferred method variant provides that in at least one operating mode, a metered addition of at least two different Water conditioning agents is provided.
• the two different water conditioning agents are basically in different
• Water conditioning agents various properties of the water can be adjusted specifically and independently.
• Water conditioning agent as well as the amount of or
• Water conditioning agent which are provided per amount of water to be treated for metering, are constant. This is particularly easy to control; Dose changes within one operating mode are eliminated, which in turn can reduce wear.
• all operating modes are set up constant.
• Water conditioning agent which are provided per amount of water to be treated for dosing, within at least one of
• step a) also a definition of several, consecutive, further parameter intervals of possible values of at least one other
• step c) the further water parameter of the untreated water is measured, an assignment of the value of the measured, further water parameter to one of the further parameter intervals ensues, and the assignment of the operating mode also as a function of assigned further parameter intervals.
• the adaptation of the dosing capacity to the water quality can be carried out even more precisely.
• the conductivity and the pH, or else the conductivity and the temperature of the water to be treated are preferably determined.
• an alarm message is issued if the measured value of the water parameter of the water to be treated exceeds an upper limit value and / or if the measured value of the water parameter of the water to be treated falls below a lower limit value. Due to the alarm, the user is at a considerable
• a variant of the method which provides for switching to a predefined standard operating mode when the measured value of the water parameter of the water to be treated exceeds an upper limit and / or when the measured value of the
• Water parameters of the water to be treated falls below a lower limit, in particular wherein the standard operating mode corresponds to an average value of the water parameter of the water to be treated from previous measurements in which the upper limit was not exceeded and the lower limit was not exceeded. Too high a value for the water parameter is untrustworthy and indicates a sensor defect; according to the variant is then transferred to the standard operating mode, which is independent of (not
• FIG. 1 shows a flowchart of a variant of a method for operating a metering system according to the invention
• Fig. 2 is an assignment diagram of a variant of a method for
• 3 is a mapping diagram of another variant of a
• Fig. 4 is a schematic representation of a first embodiment
• a metering system comprising a conductivity sensor and a reservoir for water conditioning agent
• 5 shows a schematic representation of a second embodiment of a metering system according to the invention, with a conductivity sensor and a pH meter and two storage containers for water conditioning agent, each with its own metering pump;
• Fig. 6 is a schematic representation of a third embodiment
• thermometer a metering system according to the invention, with a conductivity sensor and a thermometer and three
• FIG. 1 illustrates with a flow chart the basic sequence of a method for operating a metering system according to the invention.
• Water parameter is used here as an example of the conductivity of the water to be treated; further water parameters are not evaluated in this example.
• the conductivity of a water to be treated is measured 5.
• the specific conductivity falls within one of the defined
• Water conditioning agent selected 6; the (here only) metering pump of the dosing is operated according to this operating mode 7, whereby usually a certain concentration of water conditioning agent in the treated water is given.
• the conductivity is measured again 8 and the assignment to the previous conductivity interval is checked. If the measured value falls within a different conductivity interval than the previously measured value, cf. Test 9 continues with the redefinition of the operation mode in step 6. If the affiliation with the previous conductivity interval has not changed, the operation of the metering pump 7 can be continued in the unchanged operating mode.
• FIG. 2 illustrates the definition and assignment of parameter intervals and operating modes in an example in which in turn only the conductivity 20 of the water to be treated (here drinking water) is determined as a water parameter. Further water parameters are not evaluated here.
• a water conditioning agent here hardness stabilizer
• the first conductivity interval 21 comprises the conductivity values from 0 to less than 250 S / cm
• the second conductivity interval 22 comprises the conductivity values from 250 to less than 500 pS / cm
• the third conductivity interval 23 comprises the conductivity values from 500 to less than 750 pS / cm
• the fourth conductivity interval 21 comprises the conductivity values from 0 to less than 250 S / cm
• the second conductivity interval 22 comprises the conductivity values from 250 to less than 500 pS / cm
• the third conductivity interval 23 comprises the conductivity values from 500 to less than 750 pS / cm
• the fourth conductivity interval 21 comprises the conductivity values from 0 to less than 250 S / cm
• the second conductivity interval 22 comprises the conductivity values from 250 to less than 500 pS / cm
• the third conductivity interval 23 comprises the conductivity values from 500 to less than 750 pS / cm
• the fourth conductivity interval 23 comprises the conductivity values from 500 to less than 750 pS / cm
• Conductivity interval 24 all conductivity values from 750 pS / cm.
• Each conductivity interval is assigned here exactly one operating mode 25, 26, 27, 28.
• Operating modes 25-28 all provide different dosages of a hardness stabilizer (here polyphosphates).
• a hardness stabilizer here polyphosphates
• Operating mode 25 which is associated with the first conductivity interval 21, no hardness stabilizer is added.
• the second operating mode 26 the is assigned to the second conductivity interval 22, 1 mg of hardness stabilizer per liter of water to be treated is added.
• the third operating mode 27 which is assigned to the third conductivity interval 23, 3 mg / l is metered in, and in the fourth operating mode 28, finally 5 mg / l are added.
• the additions are each time-independent ("constant").
• the Drinking Water Ordinance stipulates that phosphates can be added up to one
• Concentration of a maximum of 5 mg / l may be added to the drinking water.
• the first conductivity interval 21 corresponds to a hardness of the water to be treated from 0 ° dH to 7 ° dH.
• the very soft water does not require polyphosphates for hardness stabilization.
• (Conductivity range) 22 is a water hardness of 7 ° dH to 14 ° dH. in front.
• the medium hard water requires little hardness stabilizing
• the concentration of added poly-phosphate increases to 3 mg / l.
• the fourth conductivity interval (conductivity range) 24 very hard water with a hardness greater than 21 ° dH is present.
• the maximum permissible concentration of 5 mg / l of hardness-stabilizing polyphosphates according to the Drinking Water Ordinance is added.
• the conductivity of the water to be treated is therefore assigned here to a water hardness; the conductivity intervals thus correspond to hardness ranges.
• the method according to the invention ensures in a simple manner that the prescribed limit values of the drinking water ordinance are complied with for each water quality. This is a central requirement of DIN 19635-00, which serves as the basis for testing DVGW certifications
• heating water can also be mixed with anticorrosion agent as a function of the conductivity as a water parameter.
• anticorrosion agent As a function of the conductivity as a water parameter. The higher the specific conductivity of the heating water to be treated, the more likely the occurrence of corrosion in the heating system. Correspondingly more anticorrosion agent must be added to the heating water.
• a classification can be made here, for example, as follows:
• FIG. 3 illustrates the definition and assignment of parameter intervals and operating modes in an example in which again only the conductivity 20 of the water to be treated (here drinking water) is determined as a water parameter. Further water parameters are not evaluated here. However, several water conditioning agents are used.
• the metering system operated in accordance with the definition and assignment illustrated in FIG. 3 comprises two metering pumps, the first metering pump metering corrosion-inhibiting ortho-phosphates, while the second metering pump meters corrosion-inhibiting ortho-phosphates
• Metering pump is operated with hardness-stabilizing poly-phosphates.
• first conductivity interval 31 below 300 pS / cm
• Soft water tends very little to form stones, but in soft waters corrosion phenomena can occur in domestic installations, since there is no formation of protective layers on pipe walls. Therefore, in the first conductivity interval 31, little hardness-stabilizing polyphosphates (concentration 1 mg / l) are used, whereas the concentration of the dosed corrosion-inhibiting ortho-phosphates is high (3 mg / l). This is defined in the assigned first operating mode 34.
• the first dosing pump now doses little ortho-phosphate (1 mg / l), while the second dosing pump adds a high concentration of hardness-stabilizing polyphosphates to the water to be treated (3 mg / l). This is defined in the assigned third operating mode 36.
• the second conductivity region 32 covers water of medium hardness (300 to 500 pS / cm).
• a mean concentration of ortho- and poly-phosphates (2 mg / l each) is used for water conditioning. This is defined in the associated second operating mode 35.
• the added total phosphate concentration is in all three
• Conductivity ranges 31, 32, 33 at 4 mg / l.
• the administration of hardness-stabilizing polyphosphates can be completely dispensed with, and in the case of hard water, the administration of corrosion-inhibiting orthophosphates can be completely dispensed with, as explained in the following table: Conductivity interval WaterProblem Water conditioner hardness
• Conductivean Anticorrosionan Anticorrosionan Anticorrosion agent medium medium, medium, medium,
• Water treatment aims to reduce the risk of corrosion in a heating circuit in which aluminum-containing materials and other materials (steel, copper) are installed.
• Aluminum-containing materials corrode at pH values above 8.5, while for the resistance of other materials in
• Heating systems such as steel and copper have a pH in the alkaline range above 8.2 is favorable.
• buffer By adding buffer, the pH in the treated water can be converted to a desired pH range between 8.2 and 8.5.
• corrosion inhibitor is added.
• dosing Fig. 4 shows schematically an embodiment of a dosing system 40 according to the invention, in which the conductivity of the water to be treated with a sensor 41, namely a
• Conductivity sensor 41 a is detected.
• the water to be treated flows through an inlet 42, wherein the inlet 42 can be closed with a shut-off valve 43 (note that the inlet 42 reaches to the metering pump 48).
• a check valve 44 prevents backflow against the normal inflow direction.
• an electronic control device 46 are in a memory 47th
• the electronic controller 46 evaluates the signals from the sensor 41 (i.e., determines the conductivity LF of the water to be treated) and assigns the associated mode of operation.
• the metering pump 48 is provided by the metering pump 48 .
• Controlled control device 46 which consists of a reservoir 49 a
• the delivery rate is chosen so that, taking into account the amount of water flowing through, which is determined by the flow meter 45, a the operating mode
• a display 51 is provided on the electronic control device 46, which displays the current measured conductivity (here 735 MS / cm) as well as the currently valid operating mode (here "M1"), by means of a signal generator 53 (in this case a light signal) a
• Fig. 5 is a second embodiment of an inventive
• Dosing system 40 shown schematically. The essential differences from the embodiment of FIG. 4 will be explained below.
• the metering system 40 comprises two sensors 41, namely one
• Conductivity sensor 41 a and a pH electrode 41 b which check the quality of the water to be treated; the signals of the sensors 41 are in turn evaluated by the electronic control device 46.
• This has stored in its memory 47 definitions of parameter intervals for both the electrical conductivity and the pH value (programmed), and the assignment of an operating mode takes into account the affiliation of the current conductivity value belonging
• the display 51 outputs here the current conductivity, the current pH value and the valid operating mode.
• the control device 46 controls here two metering pumps 48a, 48b, each with its own storage tanks 49a, 49b with different
• Control device 46 the two water conditioning agent independently from each other dosing.
• one of the reservoir 49a contains a corrosion inhibitor
• the other reservoir contains a buffer solution.
• Fig. 6 shows schematically a third embodiment of a dosing system 40 according to the invention. Again, only the essential differences from the previous embodiments will be explained.
• the dosing system 40 here comprises two sensors 41, namely one
• Conductivity sensor 41a and a temperature sensor 41c for determining the quality of the water to be treated.
• the signals from the sensors 41 are forwarded to the electronic control device 46.
• the memory 47 of the control device 46 contains definitions of parameter intervals for both the conductivity LF and the temperature T, and the assignment of an operating mode takes into account the affiliation of the parameter interval associated with the current conductivity value and the further parameter interval associated with the current water temperature.
• the display 51 outputs here the current conductivity, the current temperature and the valid operating mode.
• the control device 46 controls a dosing pump 48 and a motor-switchable valve 52 here.
• the valve 52 can be one of three
• Reservoirs 49a, 49b, 49c are selected, from which the metering pump 48 sucks water conditioning agent and promotes into the water to be treated.
• the delivery rate is adjusted to the instantaneous water flow rate as determined with the flowmeter 45 to give a desired concentration of the water conditioning agent in the treated water corresponding to the current operating mode.
• the three reservoirs 49a, 49b, 49c here contain different mixtures of ortho-phosphates and poly-phosphates.
• the first reservoir 49a here is a conditioner containing 3 mg of an ortho-phosphate and 10 mg of a poly-phosphate per 1 ml solution; This conditioner is used for soft water.
• a conditioner containing 2 mg of an ortho-phosphate and 20 mg of a poly-phosphate per 1 ml of solution is contained; This conditioner is used for medium-hard water.
• Vorrast investigatinger 49c is a conditioning agent with 1 mg of an ortho-phosphate and 30 mg of a poly-phosphate per 1 ml of solution included; This conditioner is used for hard water.
• a concentration of 0.05 ml solution per liter of water to be treated is added at temperatures below 10 ° C. At temperatures between 10 ° C and 30 ° C 0.10 ml of solution per liter of water to be treated are added, and at temperatures above 30 ° C 0.15 ml of solution per liter of water to be treated are added.
• the invention describes a dosing and a
• At least one sensor for their operation, wherein the water quality of the water to be treated is monitored by means of at least one water parameter.
• at least one sensor for this monitoring, at least one sensor, in particular a
• An operating mode which determines the delivery rate of at least one metering pump for a water conditioning agent is determined by the fact that a measured value of the water parameter belongs to one of several parameter intervals. This allows the

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Citations (5)

• 2012
  • 2012-07-23 DE DE102012212865.4A patent/DE102012212865A1/de not_active Withdrawn
• 2013
  • 2013-07-19 WO PCT/EP2013/065302 patent/WO2014016216A1/de active Application Filing
  • 2013-07-19 EP EP13739428.4A patent/EP2874948B1/de active Active
  • 2013-07-19 PL PL13739428T patent/PL2874948T3/pl unknown
  • 2013-07-19 ES ES13739428.4T patent/ES2625708T3/es active Active

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